Hi guys i know this is a mac forum and i do own a mac but this is a quick question about windows installed via bootcamp. I have a unactivated version of windows 7 installed on my imac i5 and the original product key has been used on another machine after my dad had trouble with his windows vista. I recently bought from Playtrade (play.coms answer to ebay) a new windows 7 My question is can the product key be used to activate the already unactivated version of windows installed on my mac i've tried looking on microsofts site and its a maze after 30 mins i gave up. Or is the reason i'm getting the product key is blocked, due to i'm trying to use it on a windows install not coming from the disc's supplied Or is it more likely i've been seen off by the guy who sold it to me and it's been blocked as its been used with multiple pc's already. code;0xc004c003 description the activation server determined the specified product key has been blocked. Many Thanks I have contacted the seller and they are going to get back to me in a day or 2 I think i'll ask for my money back I really don't want to have to uninstall and re-install windows on this mac again.